Personally I would find Z-Channel & Alpha to be immensely helpful (in that order). It would be great to be able to separately select channels for saving out, and even better if we could get a channel back into, say, Grasshopper in an automated fashion. Since Neon is theoretically being used to accelerate rapid preview, it isn't particularly helpful for anyone who works in a composite-based workflow if we can't hand off separate channels down the line for full preview of the final look.